12-year-old Ragnhild hears a legend about a mad horse that long, long ago ran away from its owners and fled to the mountains. Since then, no one has seen the wild animal. Until now. Ragnhild hears noises in the night and catches a glimpse of a large, black figure trampling in the yard. Shortly afterwards, the animal is gone. She tells others about her experiences, but no one believes her. She therefore decides to travel up to the mountain farm and stay in her family's old cabin. Perhaps she will see the black horse again there. She takes her best friend with her to the mountains in search of the so-called "Wild Horse." However, the wild animal is not the only danger posed by the mighty Sunnmøre Alps. Dangers lurk everywhere in the wild landscape, and hunters are also hunting in the same area. They shoot almost anything they come across.